RE: [PATCH 11/23] arm: [MVE intrinsics] add unspec_mve_function_exact_insn_vshl

[Kyrylo Tkachov <Kyrylo.Tkachov@arm.com>]

> -----Original Message-----
> From: Christophe Lyon <christophe.lyon@arm.com>
> Sent: Friday, May 5, 2023 9:39 AM
> To: gcc-patches@gcc.gnu.org; Kyrylo Tkachov <Kyrylo.Tkachov@arm.com>;
> Richard Earnshaw <Richard.Earnshaw@arm.com>; Richard Sandiford
> <Richard.Sandiford@arm.com>
> Cc: Christophe Lyon <Christophe.Lyon@arm.com>
> Subject: [PATCH 11/23] arm: [MVE intrinsics] add
> unspec_mve_function_exact_insn_vshl
> 
> Introduce a function that will be used to build vshl intrinsics. They
> are special because they have to handle MODE_r.
> 

Ok.
Thanks,
Kyrill

> 2022-09-08  Christophe Lyon <christophe.lyon@arm.com>
> 
> 	gcc/
> 	* config/arm/arm-mve-builtins-functions.h (class
> 	unspec_mve_function_exact_insn_vshl): New.
> ---
>  gcc/config/arm/arm-mve-builtins-functions.h | 150 ++++++++++++++++++++
>  1 file changed, 150 insertions(+)
> 
> diff --git a/gcc/config/arm/arm-mve-builtins-functions.h
> b/gcc/config/arm/arm-mve-builtins-functions.h
> index 5abf913d182..533fd1159c6 100644
> --- a/gcc/config/arm/arm-mve-builtins-functions.h
> +++ b/gcc/config/arm/arm-mve-builtins-functions.h
> @@ -376,6 +376,156 @@ public:
>    }
>  };
> 
> +/* Map the function directly to CODE (UNSPEC, M) for vshl-like
> +   builtins. The difference with unspec_mve_function_exact_insn is
> +   that this function handles MODE_r and the related unspecs..  */
> +class unspec_mve_function_exact_insn_vshl : public function_base
> +{
> +public:
> +  CONSTEXPR unspec_mve_function_exact_insn_vshl (int unspec_for_sint,
> +						 int unspec_for_uint,
> +						 int unspec_for_n_sint,
> +						 int unspec_for_n_uint,
> +						 int unspec_for_m_sint,
> +						 int unspec_for_m_uint,
> +						 int unspec_for_m_n_sint,
> +						 int unspec_for_m_n_uint,
> +						 int unspec_for_m_r_sint,
> +						 int unspec_for_m_r_uint,
> +						 int unspec_for_r_sint,
> +						 int unspec_for_r_uint)
> +    : m_unspec_for_sint (unspec_for_sint),
> +      m_unspec_for_uint (unspec_for_uint),
> +      m_unspec_for_n_sint (unspec_for_n_sint),
> +      m_unspec_for_n_uint (unspec_for_n_uint),
> +      m_unspec_for_m_sint (unspec_for_m_sint),
> +      m_unspec_for_m_uint (unspec_for_m_uint),
> +      m_unspec_for_m_n_sint (unspec_for_m_n_sint),
> +      m_unspec_for_m_n_uint (unspec_for_m_n_uint),
> +      m_unspec_for_m_r_sint (unspec_for_m_r_sint),
> +      m_unspec_for_m_r_uint (unspec_for_m_r_uint),
> +      m_unspec_for_r_sint (unspec_for_r_sint),
> +      m_unspec_for_r_uint (unspec_for_r_uint)
> +  {}
> +
> +  /* The unspec code associated with signed-integer, unsigned-integer
> +     and floating-point operations respectively.  It covers the cases
> +     with the _n suffix, and/or the _m predicate.  */
> +  int m_unspec_for_sint;
> +  int m_unspec_for_uint;
> +  int m_unspec_for_n_sint;
> +  int m_unspec_for_n_uint;
> +  int m_unspec_for_m_sint;
> +  int m_unspec_for_m_uint;
> +  int m_unspec_for_m_n_sint;
> +  int m_unspec_for_m_n_uint;
> +  int m_unspec_for_m_r_sint;
> +  int m_unspec_for_m_r_uint;
> +  int m_unspec_for_r_sint;
> +  int m_unspec_for_r_uint;
> +
> +  rtx
> +  expand (function_expander &e) const override
> +  {
> +    insn_code code;
> +    switch (e.pred)
> +      {
> +      case PRED_none:
> +	switch (e.mode_suffix_id)
> +	  {
> +	  case MODE_none:
> +	    /* No predicate, no suffix.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q (m_unspec_for_uint, m_unspec_for_uint,
> e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q (m_unspec_for_sint, m_unspec_for_sint,
> e.vector_mode (0));
> +	    break;
> +
> +	  case MODE_n:
> +	    /* No predicate, _n suffix.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_n (m_unspec_for_n_uint,
> m_unspec_for_n_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_n (m_unspec_for_n_sint,
> m_unspec_for_n_sint, e.vector_mode (0));
> +	    break;
> +
> +	  case MODE_r:
> +	    /* No predicate, _r suffix.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_r (m_unspec_for_r_uint,
> m_unspec_for_r_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_r (m_unspec_for_r_sint,
> m_unspec_for_r_sint, e.vector_mode (0));
> +	    break;
> +
> +	  default:
> +	    gcc_unreachable ();
> +	  }
> +	return e.use_exact_insn (code);
> +
> +      case PRED_m:
> +	switch (e.mode_suffix_id)
> +	  {
> +	  case MODE_none:
> +	    /* No suffix, "m" predicate.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_m (m_unspec_for_m_uint,
> m_unspec_for_m_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_m (m_unspec_for_m_sint,
> m_unspec_for_m_sint, e.vector_mode (0));
> +	    break;
> +
> +	  case MODE_n:
> +	    /* _n suffix, "m" predicate.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_m_n (m_unspec_for_m_n_uint,
> m_unspec_for_m_n_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_m_n (m_unspec_for_m_n_sint,
> m_unspec_for_m_n_sint, e.vector_mode (0));
> +	    break;
> +
> +	  case MODE_r:
> +	    /* _r suffix, "m" predicate.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_m_r (m_unspec_for_m_r_uint,
> m_unspec_for_m_r_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_m_r (m_unspec_for_m_r_sint,
> m_unspec_for_m_r_sint, e.vector_mode (0));
> +	    break;
> +
> +	  default:
> +	    gcc_unreachable ();
> +	  }
> +	return e.use_cond_insn (code, 0);
> +
> +      case PRED_x:
> +	switch (e.mode_suffix_id)
> +	  {
> +	  case MODE_none:
> +	    /* No suffix, "x" predicate.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_m (m_unspec_for_m_uint,
> m_unspec_for_m_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_m (m_unspec_for_m_sint,
> m_unspec_for_m_sint, e.vector_mode (0));
> +	    break;
> +
> +	  case MODE_n:
> +	    /* _n suffix, "x" predicate.  */
> +	    if (e.type_suffix (0).unsigned_p)
> +	      code = code_for_mve_q_m_n (m_unspec_for_m_n_uint,
> m_unspec_for_m_n_uint, e.vector_mode (0));
> +	    else
> +	      code = code_for_mve_q_m_n (m_unspec_for_m_n_sint,
> m_unspec_for_m_n_sint, e.vector_mode (0));
> +	    break;
> +
> +	  default:
> +	    gcc_unreachable ();
> +	  }
> +	return e.use_pred_x_insn (code);
> +
> +      default:
> +	gcc_unreachable ();
> +      }
> +
> +    gcc_unreachable ();
> +  }
> +};
> +
>  } /* end namespace arm_mve */
> 
>  /* Declare the global function base NAME, creating it from an instance
> --
> 2.34.1